001 /* 002 * Copyright (C) 2010 eXo Platform SAS. 003 * 004 * This is free software; you can redistribute it and/or modify it 005 * under the terms of the GNU Lesser General Public License as 006 * published by the Free Software Foundation; either version 2.1 of 007 * the License, or (at your option) any later version. 008 * 009 * This software is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * You should have received a copy of the GNU Lesser General Public 015 * License along with this software; if not, write to the Free 016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org. 018 */ 019 020 package org.crsh.vfs.spi.jarurl; 021 022 import org.crsh.vfs.spi.AbstractFSDriver; 023 024 import java.io.IOException; 025 import java.io.InputStream; 026 import java.net.JarURLConnection; 027 import java.net.URL; 028 import java.util.Collections; 029 import java.util.HashMap; 030 import java.util.Map; 031 import java.util.jar.JarEntry; 032 import java.util.jar.JarFile; 033 034 /** 035 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a> 036 * @version $Revision$ 037 */ 038 public class JarURLDriver extends AbstractFSDriver<Handle> { 039 040 /** . */ 041 final ClassLoader loader; 042 043 /** . */ 044 final Handle root; 045 046 /** . */ 047 final URL jarURL; 048 049 private static Handle get(JarURLDriver driver, Map<String, Handle> handles, String path) { 050 Handle handle = handles.get(path); 051 if (handle == null) { 052 handle = new Handle(driver, path); 053 int to = path.length(); 054 if (path.charAt(to - 1) == '/') { 055 to--; 056 } 057 int from = -1; 058 for (int i = to - 1;i >= 0;i--) { 059 if (path.charAt(i) == '/') { 060 from = i; 061 break; 062 } 063 } 064 String name; 065 Handle parent; 066 if (from == -1) { 067 parent = handles.get(""); 068 name = path.substring(0, to); 069 } else { 070 parent = get(driver, handles, path.substring(0, from)); 071 name = path.substring(from + 1, to); 072 } 073 parent.children.put(name, handle); 074 handles.put(path.substring(0, to), handle); 075 } 076 return handle; 077 } 078 079 public JarURLDriver(ClassLoader loader, JarURLConnection conn) throws IOException { 080 JarFile file = conn.getJarFile(); 081 Map<String, Handle> handles = new HashMap<String, Handle>(); 082 handles.put("", root = new Handle(this, "")); 083 for (JarEntry entry : Collections.list(file.entries())) { 084 Handle handle = get(this, handles, entry.getName()); 085 handle.entry = entry; 086 } 087 088 // 089 this.jarURL = conn.getJarFileURL(); 090 this.loader = loader; 091 } 092 093 public Handle root() throws IOException { 094 return root; 095 } 096 097 public String name(Handle handle) throws IOException { 098 return handle.path.getName(); 099 } 100 101 public boolean isDir(Handle handle) throws IOException { 102 return handle.path.isDir(); 103 } 104 105 public Iterable<Handle> children(Handle handle) throws IOException { 106 return handle.children.values(); 107 } 108 109 public long getLastModified(Handle handle) throws IOException { 110 return 0; 111 } 112 113 public InputStream open(Handle handle) throws IOException { 114 return loader.getResourceAsStream(handle.entry.getName()); 115 } 116 }